Calculating machine



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CALCULATING MACHINE Original Filed Jan. 15, 1940 18 Sheets-Sheet 9 Nov. 1, 1949 T. o. MEHAN CALCULATING MACHINE l8 Sheets-Sheet 10 Original Filed Jan. 15, 1940 INVENTOR.

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Nov. '1, 1949 T. o. MEHAN CALCULATING MACHINE l8 Sheets-Sheet l4 Qriginal Filed Jan. 15 1940 R O T N E W A 1 BY ThomaJ Oflchan ATTO N Nov. 1, 1949 T. o. MEHAN CALCULATING MACHINE l8 Shee'ts-Sheet 15 Original Filed Jan. 15

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Nov. 1, 1949 T. o. MEHAN CALCULATING MACHINE 18 Sheets-Sheet 16 Original Filed Jan. 15, 1940 INVENTOR. BY 'Thomas Ofle/Zan MAM 4 I if V A RNEY.

Nov. 1, 1949 T. o. MEHAN 2,486,959

CALCULATING MACHINE Original Filed Jan. 15, 1940 18 Sheets-Sheet 17 INVENTOR.

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Ulllr Patented Nov. 1, 1949 CALCULATING MACHINE Thomas O. Mehan, Park Ridge, 111., assignor to Victor Adding Machine 00., Chicago, 111., .a. corporation of Illinois Original application January 15, 1940, Serial No.

Divided and this application December 7, 1944, Serial No. 566,980

2 Claims. 1

The general object of this invention is to provide a calculating machine having printing and adding mechanisms:so .designed and constructed as to permit them -withminor changes to be adapted for control either by 10-keykeyboards or full-key keyboards.

Another object of theinvention is to provide the foregoing features made .in accordance with such design that the number of denominations capable of being 'printed and added may be increased from the .minimum 1 commercial requirements to the maximum commercial requirements merely by the addition of units which duplicate the units required in the smaller capacity machines.

Another objectof the invention is to provide calculating machines containing the above features and advantages and further designed that substantially the same frame-and casing may be used in either the .10 or full-key machines.

Another object-of .theinvention is to provide a calculating machine which may be interchangeably controlled by a 10-key .or full keyboard, neither of which will require an idle'operationto prepare for atotalizing operation and in either of which the repeat, total andsub-total keys :are manipulatedby the operator in the. same manner.

Another object .of the invention is to provide the foregoing features and advantages in machines that are peculiarly .adapted for compact 5 .for controllingthe adding and .printing mechanisms.

The details of construction o'fthejfullkeyboard control unit, and theadding'andprinting mechanisms including the platen .and paper .ieeding apparatus are fully disclosed and claimed inmy co-pending application Serial #282,787,yfi1ed July 4, 1939, which has been abandoned.

Fig. 1 is a longitudinal vertical sectional View taken approximately on the line I-l of Fig. 2.

Fig. 2 is a plan view showing an adding machine provided with 10 keys.

Fig. 3 is a longitudinal vertical section view of the machine in a plane just inside the right hand vertical frame plate, on line 3-3 of Fig. '7.

Fig. 4 is a partial sectional view on the line 4-4 of Fig. '7.

Fig. 5 is a. sectional view on the line 5-5 of Fig. 7.

Fig. 6 is a skeleton view partially in section on the line 8-6 of Fig. 7.

Fig. '7 is a view partially in section on the broken line 'l-l ofFig. 4.

Fig. Sis a. sectional view on the line 8-8 of Fig. 1.

Fig. 9 is a plan view of the keyboard equipped with 10 keys.

Fig. 10 is a sectional view on the line |0l0 of Fig. 5.

Fig. 11 is a plan view-of the front end of the machine with the keyboard removed and disclosing the'movable pin carriage.

Fig. 12 is :a vertical sectional view on the line i2l2 of Fig. 11.

Fig. 13 is a vertical sectional view on the line l3l3 of Fig. 12.

Fig. 14 is a perspective view of the handle hub 25.

Fig. 15 is a side elevation of the swinging accumulator frame assembly.

Fig. 16 is a plan view of the accumulator frame assembly.

Fig. 17 is a skeleton view showing the rectifier bar and its operating means, as viewed from the plane of the line I'Il'l of'Fig. '7.

Fig. 18 is a view showing the position of some of the parts when the total key has been. rotated to total-taking position.

Fig. 19 is a view showing the same parts when the total key has been operated to sub-total position.

Fig. 20 is a side elevation of a numeral type sector wheel.

Fig. 21 is a side elevation of a signal type sector Wheel.

Fig. 22 is a side elevation of an assembly of a type sector wheel and adding sector.

Fig. 23 is a side elevation showing the control pawl arm assembly.

Fig. 24 is a top plan view of the same assembly.

Fig. 25 is a view showing the rack restore gear mechanism rotated to full forward stroke position as it functions with either the IO-key or full keyboard machines. A diiference between the cam plate 43 shown in Figure 25 and the corresponding cam plate 43 shown in Figure 6 will be noted and explained hereinafter, the latter cam being employed on the 10-key machine and the 43' cam being employed on the full key machine.

Fig. 26 is a sectional view taken approximately on the line -5 of Fig. '7.

Fig. 27 is a diagrammatic .view partially in Section on the line 6-6 of Fig. 7.

Fig. 28 is a top plan view of a typical stop slide employed in the full keyboard machine.

Fig. 29 is a partial sectional view on the line 29-29 of Fig. 33.

Fig. 30 is a sectional view on the line 3ll30 of Fig. 33.

Fig. 31 is a sectional view on the line 3l--3l of Fig. 33.

Fig. 32 is a plan view partially in section of a full keyboard assembly unit.

Fig. 33 is a sectional view substantially on the line 33 of Fig. '7.

General frame The frame of the machine comprises a base plate I, on which are mounted a pair of main side frame plates and a pair of intermediate frame plates. The vertical side plates 2 and 3, as shown in Fig. 7, are secured to the base plate by means of several short projections similar to the projections 4 and 5 which extend through the base plate and are swaged to overlap the narrow slots through which these, projections extend. This form of connection is not only simple and economical but is exceedingly firm and durable and is used extensively throughout this machine, as will later appear.

The intermediate vertical frame plates 6 and 1 are secured to the base plate in like manner, by swaged projections.

To cover these swaged connections and various openings which are provided in the base plate, I employ a cover plate 8 on which are mounted a plurality of rubber feet such as 9, a layer I0 of felt being preferably interposed between plates 8 and I. The covering plate may be secured to the base plate by screws.

The main side plates are rigidly secured together at the rear end by means of the vertical plate I l swaged projections such as l2 extending through the vertical plate from the side frame plates to form this connection. The front end of the main side frame plates are connected by v a plate or cross bar l3 (see Fig. 2).

Several projections (not shown) from the bottom edges of the main frame plates likewise extend through (slots not shown) the base plate and are swaged to lock the plates together.

Dowel pins such as I 4 are provided on the base plate at the four corners to aid in positioning the cover IS. The cover may be locked to the base plate by means of a pair of identical latches on opposite sides of the machine, one latch l6 being shown in Fig. 1 engaging a slot I] provided in a vertical reinforcing rib on the inside of the casing.

It will be observed that the main frame and cover assembly herein described is substantially identical with the assembly and cover employed in my full keyboard adding machine, the latter being the subject matter of a co-pending application, Serial No. 282,787, filed July 4, 1939.

Full stroke mechanism The full stroke mechanism herein employed is identical with that shown in the above mentioned co-pending application.

The main drive or operating shaft I8 is journalled in the side plates in bushings l9 and 20. A sleeve 21 mounted on the shaft I8 is provided with a reduced portion 22 in which is disposed a full stroke ratchet plate 23. Outside of the latter and abutting the same is another sleeve 24 onto which may be slipped the hub 25 of the operating handle 26. A wire spring 21 which partially surrounds and in part extends through the hub 25 engages the groove 28 in sleeve 24 to aid in retaining the handle hub on the sleeve. The plate 23 is provided with slots 29 and 30 into which extend projections 3| and 32 from the hub of the operating handle whereby the forward rotation of the handle will positively drive the full stroke plate 23.

Secured to the ratchet plate 23 is a post 33 against which rests one end of a spring 34, the other end 33' of which after passing about the sleeve 2! rests against a post 35. The latter post extends through the arcuate slot 36 in the plate 23 and is provided with a washer 31 which rides on the outside margins of said slot. The post 35 is secured through the cam 38 to thetotal key lock cam and operating plate 39.

The assembly of the crank handle and ratchet plate is free, to rotate on the sleeve l8, whereas the operating plate 39 is non-rotatably secured upon hub 40, which is non-rotatablv secured to the shaft I8 by means of the pin 4 1. Hence, if the shaft is held against rotation through any cause whatsoever, at the time when the handle is being rotated forwardly, the handle hub assembly will merely rotate on the shaft l8 and will not drive the operating plate 39. Instead thereof, the spring 34 will merely be wound more tightly about the sleeve 2|, its opposite ends merely being brought more closely together as the plate 23 rotates with the handle hub. However. if the machine is in condition to be operated, the forward rotation of the handle will enable the driving spring 34 to rotate the plate 39, thus imparting a forward rotation to the main shaft !8.

Likewise, non-rotatably secured on the shaft l8 are the plates 42 and 43, these plates being secured to the bushings 44 and 45, which as shown are pinned to the shaft by pins 46 and 47. A fourth plate non-rotatably mounted on the shaft I8 is the sector gear 48, secured to the bushing sleeve 40.

Cooperating with teeth 49 on the full stroke sector is a pawl 53in the form of a bail pivoted at 5| on the side plate 3, the other symmetrically shaped end of the bail being adapted to ride over the surface of the cam 38. The spring 52 secured to the bail normally holds the bail in the position shown in Fig. 1.

In order that the mechanism driven by the main shaft l3 may have ample time to operate even if the handle should be pulled forwardly at an excessive speed, there is provided a governor driven by the sector gear 48. meshing with a pinlon gear 53 (Fig. '7), the latter being rotatably mounted on a trunnion 54, supported on the side plate 3. Keyed or otherwise secured to the gear 

